Ballpoint pen with visual window and sleeve

A press-action ball point pen, comprising:

• a) a hollow shank having an interior portion;
• b) a cartridge having an inner end;
• c) an elongated viewing window disposed on said hollow shank;
• d) operating mechanism means for operating said cartridge;
• e) printed sleeve means rotationally mounted in said hollow shank for rotation past said elongated viewing window;
• said operating mechanism comprising:
• i) cross-piece means disposed receiving said inner end of said cartridge;
• ii) pressing means disposed coaxial with said cross-piece means;
• iii) spring means supporting said cartridge;
• and
• iv) driving connection means engaging said cross-piece means, said pressing means, and said interior portion of said hollow shank, whereby each time said pressing means is pressed axially, compressing said spring means, said cross-piece means is axially displaced and rotated through a predetermined angle thereby causing rotation of said printed sleeve means past said elongated viewing window through said predetermined angle;
• f) mounting means for mounting said printed sleeve means in said hollow shank in an axially non-displaceable manner;
• said cross-piece means mounted in an axially displaceable manner relative to said printed sleeve means;
• and
• g) driving connection means including positive driving contours engaging said printed sleeve means and said cross-piece means.